How Does Temperature Affect Viscosity of an engine oil?

high temp equal low viscosity, in hot area more viscose oil needed

temperature is inversely proportional to viscocity ,which means that when the temperature of lubricant or oil rise the viscocity will decrease . so the lubricants and oil viscosity specified at special degree of temperature .

Simply, temperature and viscosity are inversely proportional. When the one increases the other decreases and vice versa. This is mainly due to the molecular motion of the liquids which varies with the temperature variation and varies the inter molecular forces. 

when temprature increase the engine oil is getting hot then motion of  moecules  increases.which causes

the low viscosity.